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1.
BMC Microbiol ; 24(1): 149, 2024 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-38678219

RESUMO

BACKGROUND: Recognition of seasonal trends in bacterial infection and drug resistance rates may enhance diagnosis, direct therapeutic strategies, and inform preventive measures. Limited data exist on the seasonal variability of Acinetobacter baumannii. We investigated the seasonality of A. baumannii, the correlation between temperature and meropenem resistance, and the impact of temperature on this bacterium. RESULTS: Meropenem resistance rates increased with lower temperatures, peaking in winter/colder months. Nonresistant strain detection exhibited temperature-dependent seasonality, rising in summer/warmer months and declining in winter/colder months. In contrast, resistant strains showed no seasonality. Variations in meropenem-resistant and nonresistant bacterial resilience to temperature changes were observed. Nonresistant strains displayed growth advantages at temperatures ≥ 25 °C, whereas meropenem-resistant A. baumannii with ß-lactamase OXA-23 exhibited greater resistance to low-temperature (4 °C) stress. Furthermore, at 4 °C, A. baumannii upregulated carbapenem resistance-related genes (adeJ, oxa-51, and oxa-23) and increased meropenem stress tolerance. CONCLUSIONS: Meropenem resistance rates in A. baumannii display seasonality and are negatively correlated with local temperature, with rates peaking in winter, possibly linked to the differential adaptation of resistant and nonresistant isolates to temperature fluctuations. Furthermore, due to significant resistance rate variations between quarters, compiling monthly or quarterly reports might enhance comprehension of antibiotic resistance trends. Consequently, this could assist in formulating strategies to control and prevent resistance within healthcare facilities.


Assuntos
Acinetobacter baumannii , Antibacterianos , Meropeném , Testes de Sensibilidade Microbiana , Estações do Ano , Temperatura , beta-Lactamases , Acinetobacter baumannii/efeitos dos fármacos , Acinetobacter baumannii/genética , Meropeném/farmacologia , Antibacterianos/farmacologia , beta-Lactamases/genética , Adaptação Fisiológica/genética , Farmacorresistência Bacteriana/genética , Humanos , Infecções por Acinetobacter/microbiologia , Proteínas de Bactérias/genética
2.
Int J Infect Dis ; 131: 16-18, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36965821

RESUMO

Salmonella enterica serovar London is known to colonize the human digestive tract and can cause gastroenteritis and diarrhea. The excretion of S. London in the stool can spread into the environment. However, S. London colonization of the gut is not known to cause infection of the soft tissues. Here, we report a case of S. London infection of the skin and soft tissue of the leg and heel.


Assuntos
Salmonella enterica , Humanos , Sorogrupo , Calcanhar , Perna (Membro) , Londres
3.
Int J Infect Dis ; 130: 86-93, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36906122

RESUMO

OBJECTIVES: The aim of this study was to provide an overview of the prevalence and molecular characteristics of Clostridioides difficile infection (CDI) in China in the past 5 years. METHODS: A systematic literature review was conducted according to the preferred reporting items for systematic reviews and meta-analyses guidelines. Nine databases were searched for relevant studies published between January 2017 and February 2022. The Joanna Briggs Institute critical appraisal tool was used to assess the quality of included studies, and R software version 4.1.3 was used for data analysis. Funnel plots and Egger regression tests were also performed to assess publication bias. RESULTS: A total of 50 studies were included in the analysis. The pooled prevalence of CDI in China was 11.4% (2696/26,852). The main circulating C. difficile strains in southern China were ST54, ST3, and ST37, consistent with the overall situation in China. However, the most prevalent genotype in northern China was ST2, which was previously underappreciated. CONCLUSION: Based on our findings, increased awareness and management of CDI is necessary to reduce the prevalence of CDI in China.


Assuntos
Clostridioides difficile , Infecções por Clostridium , Humanos , Clostridioides difficile/genética , Prevalência , Infecções por Clostridium/epidemiologia , China/epidemiologia , Genótipo
4.
Heliyon ; 9(2): e13090, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36713626

RESUMO

Objective: During the coronavirus disease 2019 (COVID-19) pandemic, an increased mental burden has been widely reported among medical health workers such as physicians and nurses. However, data on laboratory technicians exposed to COVID-19 have rarely been published. The aim of this study was to assess the magnitude of psychological symptoms among laboratory technicians and analyze potential risk factors associated with these symptoms. Methods: A cross-sectional online survey was performed via the Wenjuanxing platform (a professional online questionnaire platform) (https://www.wjx.cn/mobile/statnew.aspx) to investigate the mental health of laboratory technicians during the COVID-19 pandemic in Hebei, China from October 4, 2021, to November 3, 2021. The online questionnaire included demographic and occupational characteristics data of responders, and the Symptom Check List-90-Revised (SCL90-R)was used to quantify the magnitude of psychological symptoms among laboratory technicians. Participants' demographic and occupational characteristics were analyzed using descriptive statistical analyses. Chi-square tests were applied to compare the severity of each symptom between two or more groups. A binary logistic regression model was developed to identify the predictors of laboratory technicians' mental health in response to the COVID-19 pandemic, and outcomes are presented as odds ratios and 95% confidence interval. Statistical analysis was performed using SPSS version 21 (SPSS, New Orchard Road, Armonk, New York, USA). Results: A total of 3081 valid questionnaires were collected. Of these 3081 participants, 338 (11.0%) reported a total SCL90-R score >160, which indicated positive psychological symptoms. Among the 338 participants who reported psychological problems, most of them were mild symptoms. Several factors associated with mental health problems in laboratory technicians during COVID-19 were found, which include a history of physical and/or psychological problems (all 10 symptoms p < 0.001), more than 10 years of work experience (depression symptoms: OR = 2.350, p = 0.024; anxiety symptoms: OR = 2.642, p = 0.038), frontline work (depression symptoms: OR = 1.761, p = 0.001; anxiety symptoms: OR = 2.619, p < 0.001; hostility symptoms: OR = 1.913, p = 0.001), participant in more than 3 times large-scale SARS-CoV-2 screenings and more than 36 h per week in SARS-CoV-2 nucleic acid testing. Conclusion: A portion of laboratory technicians reported experiencing varying levels of psychological burden. During the COVID-19 pandemic, multiple interventions should be developed and implemented to address existing psychosocial challenges and promote the mental health of laboratory technicians.

5.
China Tropical Medicine ; (12): 221-2023.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-979620

RESUMO

@# Objective To investigate the drug resistance of Enterobacter cloacae isolated from blood samples in 75 member units of the Bacterial Drug Resistance Monitoring Network in Hebei, 2016- 2021, so as to provide a basis for rational drug use in clinic. Methods WHONET 5.6 software was used to retrospectively analyze drug susceptibility of Enterobacter cloacae isolated from 32 secondary hospitals and 43 tertiary hospitals. SPSS19.0 software was used for statistical analysis. Results After removing the duplicate strains, 1 225 strains of E. cloacae were isolated from blood samples of 75 hospitals during 6 years, including 157 strains from secondary hospitals and 1 068 strains from tertiary hospitals. In this study, the resistance of Enterobacter cloacae to 16 kinds of antibiotics was analyzed. The drug resistance rates to cefuroxime (52.4%-67.8%), piperacillin (27.4%-31.2%), ceftazidime (27.8%-35.5%), ceftriaxone (29.5%-45.0%), aztreonam (22.2%-32.3%), cotrimoxazole (21.6%-28.7%) were higher; the resistance rates to amikacin and tobramycin were lower than 15.0%. The resistance rates to imipenem and meropenem were 3.6%-12.3% and 5.1%-11.4%, respectively. The resistance rate to ciprofloxacin in tertiary hospitals was 22.4%, and the resistance rate to cotrimoxazole was 23.9%. Except for these two antimicrobials, the resistance rates to other antimicrobial drugs in tertiary hospitals were higher than that in secondary hospitals. A total of 121 carbapenem-resistant Enterobacter cloacae strains were detected in the past 6 years, with an increasing detection rate (χ2trend=6.305, P=0.012). Conclusions Enterobacter cloacae has great differences in antimicrobial resistance to different antibiotics, and is sensitive to carbapenems. The drug resistance in tertiary hospitals is generally higher than that in secondary hospitals. Drug resistance monitoring and drug resistance mechanism research should be strengthened to better guide clinical drug use and curb the rise of drug resistance.

6.
Micromachines (Basel) ; 13(7)2022 Jul 02.
Artigo em Inglês | MEDLINE | ID: mdl-35888882

RESUMO

Dynamic response characteristics of solenoid valves directly determined their performances. Among numerous parameters, the influence of magnetic isolation ring (MIR) on solenoid valve performance is crucial. Previous optimization studies have not conducted a systematic exploration and analysis of MIR. In this paper, a model of an AC solenoid valve considering the position of the MIR is proposed, and the model's accuracy was verified by simulation and experiments. The electromagnetic force, response time, and magnetic field distribution at different positions of the MIR were analyzed, and the effect of the position of MIR on dynamic response characteristics of the solenoid valve was clarified. The results show that the MIR affects the dynamic response characteristics of the solenoid valve by changing the magnetic circuit. With the positive translation of the position of the MIR along the Z-axis, the electromagnetic force first increases and then decreases, and the response time first decreases and then increases. The position range of MIR with excellent dynamic response performance was obtained from the comprehensive consideration of response time and electromagnetic force. Finally, the optimization design for the dynamic response performance of the solenoid valves is realized.

7.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-692652

RESUMO

Objective To analyze the viral load and complications in children patients with severe hand-foot-mouth disease(HFMD) caused by enterovirus type 71(EV71) .Methods The clinical data in 320 children patients with severe HFMD caused by EV71 treated in this hospital from January 2013 to December 2016 were retrospectively analyzed .The viral load in children patients with severe EV 71 caused HFMD was detected by adopting the fluorescence quantitative polymerase chain reaction (Q-PCR) ,and its correlation with the compli-cations was analyzed .Results The viral load in the children patients with critical type HFMD was significant-ly higher than that in the children patient with severe type HFMD ,the difference was statistically significant (P<0 .05) .Compared with severe HFMD ,the incidence rate of nervous system damage ,respiratory failure , circulatory failure and myocardial damage in critical type HFMD were significantly increased ,the difference was statistically significant (P<0 .05) .Compared with the EV71 viral load in the children patients with asep-tic meningitis ,the EV71 viral load in the children patients with brainstem encephalitis and acute flaccid paraly-sis were increased significantly ,moreover the EV71 viral load in the children patients with acute flaccid paraly-sis was significantly higher than that in the children patients with brainstem encephalitis ,the difference was statistically significant (P<0 .05) .Conclusion The viral load in children patients with severe HFMD caused by EV71 is correlated with severity of disease condition and complications ,and the viral load detection is con-ducive to disease condition monitoring and guidance of clinical treatment .

8.
PLoS One ; 12(9): e0184049, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28880966

RESUMO

There is interest in pharmacologic preconditioning for end-organ protection by targeting the HIF system. This can be accomplished by inhibition of prolyl 4-hydroxylase (PHD). GSK360A is an orally active PHD inhibitor that has been previously shown to protect the failing heart. We hypothesized that PHD inhibition can also protect the brain from injuries and resulting behavioral deficits that can occur as a result of surgery. Thus, our goal was to investigate the effect of pre-stroke surgery brain protection using a verified GSK360A PHD inhibition paradigm on post-stroke surgery outcomes. Vehicle or an established protective dose (30 mg/kg, p.o.) of GSK360A was administered to male Sprague-Dawley rats. Initially, GSK360A pharmacokinetics and organ distribution were determined, and then PHD-HIF pharmacodynamic markers were measured (i.e., to validate the pharmacological effects of the GSK360A administration regimen). Results obtained using this validated PHD dose-regimen indicated significant improvement by GSK360A (30mg/kg); administered at 18 and 5 hours prior to transient middle cerebral artery occlusion (stroke). GSK360A exposure and plasma, kidney and brain HIF-PHD pharmacodynamics endpoints (e.g., erythropoietin; EPO and Vascular Endothelial Growth Factor; VEGF) were measured. GSK360A provided rapid exposure in plasma (7734 ng/ml), kidney (45-52% of plasma level) and brain (1-4% of plasma level), and increased kidney EPO mRNA (80-fold) and brain VEGF mRNA (2-fold). We also observed that GSK360A increased plasma EPO (300-fold) and VEGF (2-fold). Further assessments indicated that GSK360A reduced post-stroke surgery neurological deficits (47-64%), cognitive dysfunction (60-75%) and brain infarction (30%) 4 weeks later. Thus, PHD inhibition using GSK360A pretreatment produced long-term post-stroke brain protection and improved behavioral functioning. These data support PHD inhibition, specifically by GSK360A, as a potential strategy for pre-surgical use to reduce brain injury and functional decline due to surgery-related cerebral injury.


Assuntos
Comportamento Animal , Lesões Encefálicas/tratamento farmacológico , Lesões Encefálicas/etiologia , Transtornos Cognitivos/tratamento farmacológico , Glicina/análogos & derivados , Atividade Motora , Inibidores de Prolil-Hidrolase/uso terapêutico , Quinolonas/uso terapêutico , Acidente Vascular Cerebral/complicações , Administração Oral , Animais , Comportamento Animal/efeitos dos fármacos , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Encéfalo/patologia , Lesões Encefálicas/sangue , Lesões Encefálicas/fisiopatologia , Transtornos Cognitivos/etiologia , Eritropoetina/sangue , Eritropoetina/genética , Glicina/administração & dosagem , Glicina/farmacocinética , Glicina/farmacologia , Glicina/uso terapêutico , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Infarto da Artéria Cerebral Média/sangue , Infarto da Artéria Cerebral Média/complicações , Infarto da Artéria Cerebral Média/patologia , Infarto da Artéria Cerebral Média/fisiopatologia , Masculino , Atividade Motora/efeitos dos fármacos , Especificidade de Órgãos/efeitos dos fármacos , Prolil Hidroxilases/metabolismo , Inibidores de Prolil-Hidrolase/administração & dosagem , Inibidores de Prolil-Hidrolase/farmacologia , Quinolonas/administração & dosagem , Quinolonas/farmacocinética , Quinolonas/farmacologia , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Ratos Sprague-Dawley , Sensação/efeitos dos fármacos , Acidente Vascular Cerebral/sangue , Acidente Vascular Cerebral/fisiopatologia , Fator A de Crescimento do Endotélio Vascular/sangue , Fator A de Crescimento do Endotélio Vascular/genética
9.
J Am Heart Assoc ; 6(5)2017 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-28487390

RESUMO

BACKGROUND: The amino acid response (AAR) is an evolutionarily conserved protective mechanism activated by amino acid deficiency through a key kinase, general control nonderepressible 2. In addition to mobilizing amino acids, the AAR broadly affects gene and protein expression in a variety of pathways and elicits antifibrotic, autophagic, and anti-inflammatory activities. However, little is known regarding its role in cardiac stress. Our aim was to investigate the effects of halofuginone, a prolyl-tRNA synthetase inhibitor, on the AAR pathway in cardiac fibroblasts, cardiomyocytes, and in mouse models of cardiac stress and failure. METHODS AND RESULTS: Consistent with its ability to inhibit prolyl-tRNA synthetase, halofuginone elicited a general control nonderepressible 2-dependent activation of the AAR pathway in cardiac fibroblasts as evidenced by activation of known AAR target genes, broad regulation of the transcriptome and proteome, and reversal by l-proline supplementation. Halofuginone was examined in 3 mouse models of cardiac stress: angiotensin II/phenylephrine, transverse aortic constriction, and acute ischemia reperfusion injury. It activated the AAR pathway in the heart, improved survival, pulmonary congestion, left ventricle remodeling/fibrosis, and left ventricular function, and rescued ischemic myocardium. In human cardiac fibroblasts, halofuginone profoundly reduced collagen deposition in a general control nonderepressible 2-dependent manner and suppressed the extracellular matrix proteome. In human induced pluripotent stem cell-derived cardiomyocytes, halofuginone blocked gene expression associated with endothelin-1-mediated activation of pathologic hypertrophy and restored autophagy in a general control nonderepressible 2/eIF2α-dependent manner. CONCLUSIONS: Halofuginone activated the AAR pathway in the heart and attenuated the structural and functional effects of cardiac stress.


Assuntos
Aminoácidos/metabolismo , Inibidores Enzimáticos/farmacologia , Fibroblastos/efeitos dos fármacos , Insuficiência Cardíaca/prevenção & controle , Miócitos Cardíacos/efeitos dos fármacos , Piperidinas/farmacologia , Inibidores da Síntese de Proteínas/farmacologia , Quinazolinonas/farmacologia , Estresse Fisiológico , Aminoácidos/deficiência , Aminoacil-tRNA Sintetases/antagonistas & inibidores , Aminoacil-tRNA Sintetases/metabolismo , Animais , Autofagia/efeitos dos fármacos , Células Cultivadas , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Fibroblastos/metabolismo , Fibroblastos/patologia , Fibrose , Insuficiência Cardíaca/metabolismo , Insuficiência Cardíaca/patologia , Insuficiência Cardíaca/fisiopatologia , Humanos , Hipertrofia Ventricular Esquerda/metabolismo , Hipertrofia Ventricular Esquerda/patologia , Hipertrofia Ventricular Esquerda/fisiopatologia , Hipertrofia Ventricular Esquerda/prevenção & controle , Células-Tronco Pluripotentes Induzidas/efeitos dos fármacos , Células-Tronco Pluripotentes Induzidas/metabolismo , Masculino , Camundongos Endogâmicos C57BL , Miócitos Cardíacos/metabolismo , Miócitos Cardíacos/patologia , Proteínas Serina-Treonina Quinases/metabolismo , Fatores de Tempo , Função Ventricular Esquerda/efeitos dos fármacos , Remodelação Ventricular/efeitos dos fármacos
10.
Cell Biol Int ; 41(8): 822-832, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28462510

RESUMO

Hyperglycemia is one of the most important pathogenesis of diabetic osteopathy. Several lines of studies indicate Runx2 plays a critical role in the process of osteogenic differentiation. However, little studies have analyzed the effect of Runx2 on osteoblast differentiation of rat bone mesenchymal stem cells (rBMSCs) in high-glucose condition. In this study, the effect of Runx2 on osteoblast differentiation in high-glucose condition was evaluated by the expression of osteogenesis-related maker including Runx2, ALP, OC, and OPN, as well as ALP staining, ALP activity, and Alizarin red S staining. Western blot analysis was performed to detect the protein expression levels of p-AKT, AKT, p-GSK3ß, GSK3ß, and ß-catenin. Immunofluorescence staining analysis was performed to detect subcellular localization of ß-catenin. Our results revealed that high glucose significantly inhibited osteogenic differentiation, hyperosmolarity did not cause a suppression. In addition, Runx2 could upregulate the expression of osteogenic-related genes and increase matrix mineralization, while applying 10 µM PI3K/AKT inhibitor LY294002 abolished the beneficial effect. Collectively, these results indicate that Runx2 alleviates high glucose-induced inhibition of osteoblast differentiation by modulating PI3K/AKT/GSK3ß/ß-catenin pathway.


Assuntos
Subunidade alfa 1 de Fator de Ligação ao Core/metabolismo , Glicogênio Sintase Quinase 3 beta/metabolismo , Células-Tronco Mesenquimais/citologia , Osteoblastos/citologia , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , beta Catenina/metabolismo , Fosfatase Alcalina/metabolismo , Animais , Calcificação Fisiológica , Diferenciação Celular/fisiologia , Glucose/administração & dosagem , Glucose/metabolismo , Células-Tronco Mesenquimais/metabolismo , Osteoblastos/metabolismo , Osteogênese/fisiologia , Ratos , Ratos Sprague-Dawley , Transdução de Sinais
11.
Exp Biol Med (Maywood) ; 242(17): 1643-1656, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-28343439

RESUMO

In vitro studies of cardiac physiology and drug response have traditionally been performed on individual isolated cardiomyocytes or isotropic monolayers of cells that may not mimic desired physiological traits of the laminar adult myocardium. Recent studies have reported a number of advances to Heart-on-a-Chip platforms for the fabrication of more sophisticated engineered myocardium, but cardiomyocyte immaturity remains a challenge. In the anisotropic musculature of the heart, interactions between cardiac myocytes, the extracellular matrix (ECM), and neighboring cells give rise to changes in cell shape and tissue architecture that have been implicated in both development and disease. We hypothesized that engineered myocardium fabricated from cardiac myocytes cultured in vitro could mimic the physiological characteristics and gene expression profile of adult heart muscle. To test this hypothesis, we fabricated engineered myocardium comprised of neonatal rat ventricular myocytes with laminar architectures reminiscent of that observed in the mature heart and compared their sarcomere organization, contractile performance characteristics, and cardiac gene expression profile to that of isolated adult rat ventricular muscle strips. We found that anisotropic engineered myocardium demonstrated a similar degree of global sarcomere alignment, contractile stress output, and inotropic concentration-response to the ß-adrenergic agonist isoproterenol. Moreover, the anisotropic engineered myocardium exhibited comparable myofibril related gene expression to muscle strips isolated from adult rat ventricular tissue. These results suggest that tissue architecture serves an important developmental cue for building in vitro model systems of the myocardium that could potentially recapitulate the physiological characteristics of the adult heart. Impact statement With the recent focus on developing in vitro Organ-on-Chip platforms that recapitulate tissue and organ-level physiology using immature cells derived from stem cell sources, there is a strong need to assess the ability of these engineered tissues to adopt a mature phenotype. In the present study, we compared and contrasted engineered tissues fabricated from neonatal rat ventricular myocytes in a Heart-on-a-Chip platform to ventricular muscle strips isolated from adult rats. The results of this study support the notion that engineered tissues fabricated from immature cells have the potential to mimic mature tissues in an Organ-on-Chip platform.


Assuntos
Ventrículos do Coração/citologia , Procedimentos Analíticos em Microchip/métodos , Miócitos Cardíacos/citologia , Miócitos Cardíacos/fisiologia , Engenharia Tecidual/métodos , Função Ventricular/fisiologia , Animais , Diferenciação Celular , Células Cultivadas , Perfilação da Expressão Gênica , Dispositivos Lab-On-A-Chip , Contração Miocárdica/fisiologia , Ratos , Ratos Sprague-Dawley
12.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-300412

RESUMO

<p><b>OBJECTIVE</b>To investigate the differences between the Test of Infant Motor Performance (TIMP) data from the infants at 38-58 weeks of postconceptual age in three hospitals in Chongqing, China and the America norms, and to provide a reference for the introduction and application of TIMP in China.</p><p><b>METHODS</b>TIMP was used to assess 642 infants with 38-58 weeks of postconceptual age who visited the departments of preterm infants or child healthcare in the Second Affiliated Hospital of Army Medical University, Shapingba Maternal and Child Health Hospital in Chongqing, and Chongqing Maternal and Child Health Hospital between January and December, 2016. The assessment scores were analyzed and compared with the America norms.</p><p><b>RESULTS</b>The TIMP scores increased with the increasing postconceptual age, with 37±5 points in the 38-39week group and 83±12 points in the 56-57week group. All age groups had a significantly lower mean score than the America norms (P<0.001).</p><p><b>CONCLUSIONS</b>TIMP scores can reflect the motor performance in infants with various postconceptual ages. The TIMP scores from the infants with a postconceptual age of 38-58 weeks in three hospitals in Chongqing are significantly different from the America norms, suggesting that it is very necessary in China to establish the Chinese norms for assessing motor performance in infants using TIMP.</p>


Assuntos
Humanos , Lactente , Recém-Nascido , Idade Gestacional , Comportamento do Lactente , Recém-Nascido Prematuro , Destreza Motora
13.
Huan Jing Ke Xue ; 37(11): 4326-4332, 2016 Nov 08.
Artigo em Chinês | MEDLINE | ID: mdl-29964688

RESUMO

The multimedia fugacity model (Ⅲ) was used to simulate the distribution, transfer and fate of typical polybrominated diphenyl ethers (PBDEs) in air, water, soil and sediment in an electrical equipment dismantling area in eastern China. The modeling data were compared with monitored values in air, soil and sediment for validation purpose. Moreover, the transfer fluxes between different compartments were analyzed in order to infer the main transfer process. Parameters of the model were tested and the key parameters were identified using sensitivity analysis method for BDE47 and BDE209.The results of sensitivity analysis indicated that vapor pressure, the lgKow value and half-life had significant influence on concentrations of PBDEs in different media. The results showed that when the system reached equilibrium, most of the PBDEs would be accumulated in soil and sediment. The air advection outflow and soil degradation were the major routes for PBDEs to disappear in the area. The results will provide the basis for the risk management of PBDEs contamination.

14.
Huan Jing Ke Xue ; 36(8): 2997-3003, 2015 Aug.
Artigo em Chinês | MEDLINE | ID: mdl-26592032

RESUMO

In situ research was conducted on the response of mercury enrichment in rice organs to elevated gaseous elemental mercury (GEM) with open-top chambers (OTCs) fumigation experiment and soil Hg enriched experiment. The results showed that Hg concentrations in roots were generally correlated with soil Hg concentrations (R = 0.9988, P < 0.05) but insignificantly correlated with air Hg concentrations (P > 0.05), indicating that Hg in rice roots was mainly from soil. Hg concentrations in stems increased linearly (R(B) = 0.9646, R(U) = 0.9831, P < 0.05) with elevated GEM, and Hg concentrations in upper stems were usually higher than those in bottom stems in OTCs experiment. Hg concentrations in bottom stems were generally correlated with soil Hg concentrations (R = 0.9901, P < 0.05) and second-order polynomial (R = 0.9989, P < 0.05) was fitted for Hg concentrations in upper stems to soil Hg concentrations, and Hg concentrations in bottom stems were usually higher than those in upper stems in soil Hg enriched experiment, indicating the combining impact of Hg from air and soil on the accumulation of mercury in stems. Hg concentrations in foliage were significantly correlated (P < 0.05) with air Hg and linearly correlated with soil Hg (R = 0.9983, P = 0.0585), implying that mercury in foliage was mainly from air and some of Hg in root from soil was transferred to foliage through stem. Based on the function in these filed experiments, it was estimated that at least 60%-94% and 56%-77% of mercury in foliage and upper-stem of rice was from the atmosphere respectively, and yet only 8%-56% of mercury in bottom-stem was attributed to air. Therefore, mercury in rice aboveground biomass was mainly from the atmosphere, and these results will provide theoretical basis for the regional atmospheric mercury budgets and the model of mercury cycling.


Assuntos
Atmosfera/química , Mercúrio/análise , Oryza/química , Poluentes do Solo/análise , Monitoramento Ambiental , Raízes de Plantas/química , Caules de Planta/química , Solo/química
15.
Ying Yong Sheng Tai Xue Bao ; 26(5): 1477-83, 2015 May.
Artigo em Chinês | MEDLINE | ID: mdl-26571668

RESUMO

It is of great importance to have a deep understanding of the spatial distribution of NPK fertilizers application and the potential threat to the ecological environment in Jiangsu Province, which is helpful for regulating the rational fertilization, strengthening the fertilizer use risk management and guidance, and preventing agricultural non-point pollution. Based on the environmental risk assessment model with consideration of different impacts of N, P, K fertilizers on environment, this paper researched the regional differentiation characteristic and environmental risk of intensity of NPK fertilizer usages in Jiangsu. Analystic hierarchy process ( AHP) was used to determine the weithts of N, P, K. The environmental safety thresholds of N, P, K were made according to the standard of 250 kg · hm(-2) for the construction of ecological counties sponsered by Chinese government and the proportion of 1:0.5:0.5 for N:P:K surposed by some developed countries. The results showed that the intensity of NPK fertilizer application currently presented a gradually increasing trend from south to north of Jiangsu, with the extremum ratio of 3.3, and the extremum ratios of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer were 3.3, 4.5 and 4.4, respectively. The average proportion of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer of 13 cities in Jiangsu was 1:0.39:0.26. Their proportion was relatively in equilibrium in southern Jiangsu, but the nutrient structure disorder was serious in northern Jiangsu. In Jiangsu, the environmental risk index of fertilization averaged at 0.69 and in the middle-range of environmental risk. The environmental risk index of fertilizer application in southern and central Jiangsu was respectively at the low and moderate levels, while that of cities in northern Jiangsu was at the moderate, serious or severe level. In Jiangsu, the regional difference of fertilizer application and environmental risk assessment were affected by many factors, including physical and economic conditions, government policy, management system, technology, and management methods.


Assuntos
Monitoramento Ambiental , Fertilizantes , Solo/química , Agricultura , China , Meio Ambiente , Nitrogênio/análise , Fósforo/análise , Potássio/análise , Medição de Risco
16.
Zhong Nan Da Xue Xue Bao Yi Xue Ban ; 40(3): 317-25, 2015 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-25832524

RESUMO

OBJECTIVE: To assess the effect of premolar extractions on third molar angulation changes in orthodontic patients. METHODS: The Cochrane library, PubMed, Embase, China Science and Technology Periodical Database, China National Knowledge Infrastructure (CNKI), Chinese Biomedical Literature Database (CBM) and Wanfang database were searched from January 1, 1990 to May 20, 2014 to identify all the studies about third molar angulation changes in orthodontic patients with or without premolars extraction, which was assigned as a extraction group and a control group. Th e extraction group was further divided into a fi rst premolar extraction subgroup and a second premolar extraction subgroup. Literature filtering, data extraction and methodological quality evaluation were finished independently by two researchers. After cross checking, the disagreements were solved by discussion. Meta-analysis was carried out by RevMan 5.3.3 software. RESULTS: Ten studies involving 712 patients were included. Meta-analysis revealed that: compared with the control group, the changes of third molar angulation in maxillary and mandible in the extraction group were statistically significantly different (all P<0.05); the difference in angulation between the two groups was about 5.19° in maxillary and 3.55° in mandibul. As for the premolar extraction subgroups, there was no significant difference in mandibular third molar angulation between them (P>0.05). CONCLUSION: The orthodontic treatment involving first or second premolar extractions can improve the maxillary third molar angulation, and the second premolar extraction is the best option.


Assuntos
Dente Pré-Molar , Dente Serotino , Extração Dentária , Povo Asiático , China , Humanos , Mandíbula , Maxila
17.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-602181

RESUMO

Objective To observe the efficacy ofHuayu Kangyou Formula combined with Western medicine for Hp-related peptic ulcer disease;To discuss the mechanism of action.Methods Totally 152 patients were randomly divided into treatment group and control group, 76 cases in each group. Control group was given standard triple therapy, while treatment group was givenHuayu Kangyou Formula based on the standard triple therapy. The treatment lasted for 6 weeks. The clincal symptom scores and gastroscopy were observed to evaluate the therapeutic effect, adverse reactions were recorded, and relapse of ulcer was followed-up.Results The total effective rates of clinical symptoms in the treatment group and the control group were 94.74% (72/76) and 84.21% (64/76), respectively;the excellent rates were 78.95% (60/76) and 55.26% (42/76), respectively;the incidences of adverse reactions were 5.26% (4/76) and 13.16% (10/76), respectively;the relapse rates after 1 year of follow-up visit were 13.63% (6/44) and 41.67% (10/24), respectively, with statistical significant difference between the two groups (P<0.05).ConclusionHuayu Kangyou Formula combined with Western medicine can effectively improve the efficacy of Hp-relative peptic ulcer disease, reduce adverse reaction rate and relapse rate.

18.
Vasc Med ; 19(6): 473-82, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25377872

RESUMO

Hypoxia inducible factor (HIF) stabilization by HIF-prolyl hydroxylase (PHD) inhibitors may improve ischemic conditions such as peripheral artery disease (PAD). This multicenter, randomized, placebo-controlled study evaluated the safety and efficacy of GSK1278863 (an oral PHD inhibitor) in subjects with PAD. The study assessed two active treatment paradigms: single dosing and subchronic daily dosing (300 mg single dose and 15 mg daily for 14 days, respectively). Neither regimen improved exercise performance compared with placebo (change from baseline in the 6-minute walk test (6MWT; feet), (GSK1278863, placebo): single dose (-46, -44), p=0.96; repeat dose (9, 8), p=0.99; change in number of contractions to onset of claudication (goniometry): single dose (4, -1), p=0.053; repeat dose (-2, 1), p=0.08). A calf-muscle biopsy substudy showed no increases in mRNA or protein levels of HIF target genes. More subjects receiving GSK1278863 than placebo experienced adverse events, particularly following the 300 mg single dose. Thus, assessing the safety of GSK1278863 in this setting would require a larger population exposed to the agent for a longer duration. These data do not support a benefit of GSK1278863 in PAD using the regimens tested. CLINICALTRIALSGOV IDENTIFIER NCT01673555:


Assuntos
Claudicação Intermitente/tratamento farmacológico , Doença Arterial Periférica/tratamento farmacológico , Inibidores de Prolil-Hidrolase/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Teste de Esforço , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Músculo Esquelético/efeitos dos fármacos , Qualidade de Vida , Fatores de Tempo , Resultado do Tratamento , Caminhada/fisiologia
19.
Hum Immunol ; 74(3): 371-8, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23220433

RESUMO

The aim of this study was to perform a meta-analysis to evaluated the association between interleukin-1ß (IL-1ß) C(3953/4)T polymorphism and chronic periodontitis (CP). Systematic searches of electronic databases and hand searching of references were performed, including PubMed, Embase and Web of Science. The pooled odds ratios (ORs) with 95% confidence intervals (95%CIs) were calculated. Publication bias was tested by Begg's funnel plot and Egger's regression test. Sensitivity analysis was conducted by limiting the meta-analysis studies conforming to Hardy-Weinberg equilibrium (HWE) or high quality (score ≥ 7). Data analyses were carried out by Stata 11.0. There were significant associations between IL-1ß C(3953/4)T polymorphism and CP (for T allele vs. C allele: OR = 1.30, 95%CI = 1.05-1.60, p = 0.02; for T/T vs. C/C: OR = 1.66, 95%CI = 1.12-2.45, p = 0.01; for C/T+T/T vs. C/C: OR = 1.28, 95%CI = 0.99-1.65; and for T/T vs. C/T+C/C: OR = 1.62, 95%CI = 1.15-2.29, p = 0.006). When stratified by ethnicity, statistically significantly elevated risk was found for Caucasians, but not for Asians. When stratified by study design, evidences of significant association was observed between IL-1ß C(3953/4)T polymorphism and CP in both population-based studies and hospital-based studies. This meta-analysis indicates that there is strong evidence for association between IL-1ß C(3953/4)T polymorphism and CP.


Assuntos
Periodontite Crônica/genética , Predisposição Genética para Doença/genética , Interleucina-1beta/genética , Polimorfismo de Nucleotídeo Único , Povo Asiático/genética , Periodontite Crônica/etnologia , Frequência do Gene , Predisposição Genética para Doença/etnologia , Genótipo , Humanos , Razão de Chances , Fatores de Risco , População Branca/genética
20.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-246296

RESUMO

<p><b>OBJECTIVE</b>To compare clinical efficacy differences among electroacupuncture (EA), transcutaneous electrical nerve stimulation (TENS) therapy and acupoint massage (AM) on periarthritis of shoulder.</p><p><b>METHODS</b>One hundred and twenty cases were randomly divided into an EA group, a TENS group and an AM group, 40 cases in each one. The selection of acupoints in the three groups were all the same, which were Jianqian (Extra), Xiabai (LU 4), Jianyu (LI 15), Binao (LI 14), Jianliao (TE 14), Naohui (TE 13), Xiaohai (SI 8) and Houxi (SI 3). EA was applied in the EA group with dense-disperse wave for 30 min, TENS therapy with dense-disperse wave for 30 min in the TENS group and AM combined with mobilization manipulation of Tuina on the shoulder in the AM group. All of the treatment was given once a day, six times a week and totally 4 weeks were required. The score of visual analogue scale (VAS) and improvement of shoulder joint activities in the three groups before and after the treatment were observed.</p><p><b>RESULTS</b>After the treatment, the VAS score and activities of shoulder joint were all improved in the three groups (all P < 0.001) and AM group had more obvious improvement than TENS group and EA group (all P < 0.05). The effective and curative rate was 61.50 (24/39) in the AM group, which was superior to 42.9% (15/35) in the EA group and 44.4% (16/36) in the TENS group (both P < 0.05). The effective and curative rate of shoulder joint activities in the AM group was 61.5% (24/39), which was superior to 48.6% (17/35) in the EA group and 44.4% (16/36) in the TENS group (both P < 0.05).</p><p><b>CONCLUSION</b>The acupoint massage has obvious clinical efficacy on periarthritis of shoulder, which could effectively relieve the pain and improve activities of shoulder joint, and it is superior to EA and TENS therapy.</p>


Assuntos
Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pontos de Acupuntura , Eletroacupuntura , Massagem , Periartrite , Terapêutica , Amplitude de Movimento Articular , Articulação do Ombro , Estimulação Elétrica Nervosa Transcutânea
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